Propspeed - Foulfree Transducer Coating [FFKIT]Foulfree Transducer Coating Formulated by industry leading scientists and certified by Airmar for transducers. Fouling on the face of transducers can reduce their sensitivity, bottom echo returns and positive fish targets. It can also increase the turbulence over the face of the transducer causing aeration and loss of bottom contact. Foulfree keeps transducers clean and operating at the top of their game for the clearest sonar images possible. The